Gaya APA
Halvarson, M. (2002).
STEP BY STEP MICROSOFT VISUAL BASIC 6.0 PROFSSIONAL .
Jakarta:
PT Elex Media Komputindo.
Gaya MLA
Halvarson, Michael.
"STEP BY STEP MICROSOFT VISUAL BASIC 6.0 PROFSSIONAL".
Jakarta:
PT Elex Media Komputindo,
2002.
Basis Data.